IBM Db2 DoS via Trap on Subquery Compilation (VB 11.5.x-12.1.x)
CVE-2026-7771 Published on July 17, 2026
IBM® Db2® is vulnerable to a trap when compiling specially crafted statements containing subqueries could lead to a denial of service
IBM Db2 11.5.0 through 11.5.9, and 12.1.0 through 12.1.4 is vulnerable to a trap when compiling a specially crafted statements containing subqueries could lead to a denial of service.
Vulnerability Analysis
CVE-2026-7771 can be exploited with local system access, requires user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Type
What is an Infinite Loop Vulnerability?
The program contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop. If the loop can be influenced by an attacker, this weakness could allow attackers to consume excessive resources such as CPU or memory.
CVE-2026-7771 has been classified to as an Infinite Loop vulnerability or weakness.
Products Associated with CVE-2026-7771
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Affected Versions
IBM Db2:- Version 11.5.0, <= 11.5.9 is affected.
- Version 12.1.0, <= 12.1.4 is affected.